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Finding the Fourth Proportional to 40,660.20, 60,941.70 and 20,928.60

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Solution

The fourth proportional to 40,660.20, 60,941.70 and 20,928.60 is: 31,367.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,660.20 : 60,941.70 = 20,928.60 : x
  2. Step 2: Convert to fraction form
    40,660.20/60,941.70 = 20,928.60/x
  3. Step 3: Cross multiply
    40,660.20x = 60,941.70 × 20,928.60
  4. Step 4: Simplify right side
    40,660.20x = 1,275,424,462.62
  5. Step 5: Solve for x
    x = 1,275,424,462.62/40,660.20
  6. Step 6: Final answer
    x = 31,367.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.